Gate valve



J. T. FAHEY Feb. 27, 1934.

GATE VALVE 1932 2 Sheets-Sheet 1 Filed Nov. 17',

Inventor Feb. 27, 1934. J FAHEY 1,949,011

GATE VALVE Filed Nov. 17, 1932 2 Sheets-Sheet 2 o o o o 0 Z6 \j InventorO0 Jo/zaz jifakey v x @Mw/m Patented Feb. 27, 1934 UNITED STATES GATEVALVE John T. Fahey, Oil City, Pa.

Application November 17, 1932 Serial No. 643,114

1 Claim.

This invention appertains to new and useful improvements in gate valves,the same being an improvement on my co-pending application Se-- rial No.626,889, filed July 30, 1932, which has as 5 one of its most importantobjects the provision of means whereby the valve could be cleaned andre-packed without removing the valve from the line and without loss ofthe contents thereof,

providing of course that the valve is primarily l closed.

The improvement over the subject matter of my aforementioned co-pendingapplication resides in the manner of supporting the screw shaft andanchoring the same below the bonnet.

The principal object of the present invention has improved over myaforementioned co-pending application in providing a valve assemblywherein the bonnet can be packed While the valve stem remains intact.

During the course of the following specification and claim, otherimportant objects and advantages of the invention will become apparentto the reader.

In the drawings:-

Figure 1 represents a vertical sectional view through the novel valvestructure.

Fig. 2 represents a top plan view of the structure with the bonnetremoved and the valve stem in section.

Fig. 3 represents a sectional view taken substantially on line 33 ofFig. 1.

Fig. 4 represents a fragmentary vertical sectional view takensubstantially on line 4-4 of Fig. l with the stem and valves removed.

35 Fig. 5 represents an outside elevational view of one of the valveelements.

Fig. 6 represents a fragmentary horizontal sectional view takensubstantially on line 6-6 of Fig. 1.

Referring to the drawings wherein like numerals designate like parts, itcan be seen that numeral 5 represents the narrow shell structure whichhas a downwardly tapering bottom with a drain plug 6 therein. The upperportion of $5 the shell which is open, is provided with a flange 7around its perimeter and projecting outwardly in opposite directions arethe coupling flanges 8 through which the inlet and outlet pipes (notshown) can be attached.

As is clearly shown in Fig. l, and also apparent in Fig. 4, each endwall of the shell 5 is provided immediately above the inlet or outletopening with a pair of bosses 9-9 constructed to accommodate a pin 10which passes through the seg- 55 mental valve element 11, the same beingprovided with a cylindrical extension 12 circumscribed by a beveledpacking annulus 13 for engagement against the corresponding valve seat14 on the inside of the shell 5.

A ridge-like formation 15 extends the full length of the curved sideportion of the valve element 11, the same being grooved and providedwith thread-like ribs for accommodating the threaded portions a of thevalve stem 16. The pair of valve elements 11 both mesh with the threadsof the threaded portion a of the valve stem and act in unison therewith.

Numeral 1'7 represents a block or bearing plate of rectangularconstruction, the samebeing provided with a lip 18 at each end thereoffor rest upon the seat 19 provided in the corresponding side wall of theshell 5 and its open top edge portion. The block 17 has a bore 20extending vertically therethrough, merging with a counterbore 21 whichin turn merges with an outwardly flaring opening 22, which forms abeveled surface against which the cap plate 23 engages as in the mannersubstantially shown in Fig. 1. This cap plate presses against theannular rib 24 on the stem 16 and prevents rising of the stem. Screws 25are employed and disposed through the cap plate 23 and driven into theopenings 26 in the block 17 to secure the cap plate snugly against theblock.

Numeral 27 represents a bonnet having a flange at its lower portiondenoted by numeral 28 and nuts 29 on bolts 30 are employed for securingthe flanges 7 and 28 together for maintaining the bonnet firmly securedto the shell 5. The bonnet 27 at its top portion is provided with asocket 31 for receiving packing material 32, this socket 31 beingprovided with an opening or bore 33 extending vertically therethroughfor receiving the upper portion of the stem 16.

A pressure plate 34 is secured to the flanged portion of the packingsocket 31 by bolts 35 and obviously this packing can be compressed bythe pressure of this pressure plate 34. The stem 16 is operated by thehand wheel 36.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having thus described my invention, what I claim as new is:--

In a valve structure, a shell, a bonnet, a rotary valve stem extendingthrough the bonnet and into said shell, said stem having a collarthereon, a bearing plate through which the stem is disposed and uponwhich the collar rests, a cap plate through which the stem extends,securing means for attaching the cap plate to the bearing plate over thesaid collar independently of the bonnet, the ends of said bearing platebeing interposed between the bonnet and the shell and securing means forsecuring the bonnet and shell together in clamping engagement with thesaid bearing Plate. J GEN T. FAHEY,

